/* ==========================================
   VIRTUOSO MUSIC ACADEMY - STYLESHEET
   Design System: Deep Midnight & Brass Gold
   ========================================== */

/* 1. CSS Variables & Theme Core */
:root {
    /* Color Palette */
    --color-bg: #050a18;           /* Deep Midnight Blue */
    --color-surface: #0c152b;      /* Dark Royal Navy */
    --color-surface-hover: #131e3d;
    --color-primary: #d4af37;      /* Brass Gold */
    --color-primary-dark: #b89327;
    --color-secondary: #00b4d8;    /* Soft Cyan */
    --color-accent: #90e0ef;       /* Light Electric Blue */
    --color-text: #e2eafc;         /* Soft Silver-Grey */
    --color-text-muted: #8d99ae;   /* Slate Silver */
    --color-white: #ffffff;
    --color-border: rgba(212, 175, 55, 0.15);
    --color-border-glow: rgba(212, 175, 55, 0.4);

    /* Fonts */
    --font-primary: 'Outfit', sans-serif;
    --font-serif: 'Playfair Display', serif;

    /* Shadows & Glows */
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --glow-primary: 0 0 15px rgba(212, 175, 55, 0.5);
    --glow-secondary: 0 0 15px rgba(0, 180, 216, 0.4);

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 2. Global Reset & Base Rules */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-primary);
    line-height: 1.65;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-padding {
    padding: 6rem 0;
}

/* 3. Spotlights and Glow Backgrounds */
.stage-spotlight {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    background: radial-gradient(circle 350px at 50% 50%, rgba(212, 175, 55, 0.08) 0%, rgba(0, 180, 216, 0.05) 50%, transparent 100%);
    transition: background 0.1s ease-out;
}

.glow-bg {
    position: fixed;
    top: -20%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* 4. Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(5, 10, 24, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.15);
    transition: var(--transition-normal);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1300px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--color-primary);
    text-shadow: var(--glow-primary);
}

.logo-accent {
    font-size: 1.4rem;
    color: var(--color-white);
}

.logo-sub {
    font-size: 0.75rem;
    color: var(--color-primary);
    font-weight: 700;
    letter-spacing: 2px;
    align-self: flex-end;
    margin-bottom: 2px;
}

.nav-menu ul {
    display: flex;
    gap: 2.2rem;
    align-items: center;
}

.nav-menu a {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-muted);
    position: relative;
    padding: 0.5rem 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition-fast);
}

.nav-menu a:hover {
    color: var(--color-white);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-cta {
    border: 2px solid var(--color-primary);
    padding: 0.5rem 1.2rem !important;
    border-radius: 50px;
    color: var(--color-primary) !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background-color: var(--color-primary);
    color: var(--color-bg) !important;
    box-shadow: var(--glow-primary);
    transform: translateY(-1px);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* 5. Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 2rem 4rem 2rem;
    max-width: 1300px;
    margin: 0 auto;
    gap: 4rem;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 1.2;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.badge {
    align-self: flex-start;
    background-color: rgba(212, 175, 55, 0.1);
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.2rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: var(--color-white);
    letter-spacing: -0.5px;
}

.highlight-serif {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 700;
    color: var(--color-primary);
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.15);
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    margin-bottom: 2.2rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.85rem 2.2rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 50px;
    cursor: pointer;
    font-family: var(--font-primary);
    transition: var(--transition-normal);
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-bg);
    border: none;
    box-shadow: var(--glow-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(212, 175, 55, 0.6);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-surface-hover);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

.hero-visual {
    flex: 0.8;
    display: flex;
    justify-content: center;
    align-items: center;
}

.poster-container {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--glow-primary);
    border: 1px solid rgba(212, 175, 55, 0.25);
    transition: var(--transition-normal);
}

.poster-container:hover {
    transform: scale(1.02);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.8), var(--glow-primary);
    border-color: var(--color-primary);
}

.main-poster {
    width: 100%;
    max-width: 420px;
    height: auto;
    object-fit: cover;
}

/* 6. Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--color-white);
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 1.5rem auto;
}

.section-divider {
    width: 80px;
    height: 4px;
    background-color: var(--color-primary);
    border-radius: 2px;
    margin: 0 auto;
    box-shadow: var(--glow-primary);
}

/* 7. About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.story-heading {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.story-p {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.quote-card {
    background-color: var(--color-surface);
    border-left: 4px solid var(--color-primary);
    padding: 2rem;
    border-radius: 0 16px 16px 0;
    margin-top: 2.5rem;
    position: relative;
    box-shadow: var(--shadow-md);
}

.quote-icon {
    font-size: 2.5rem;
    color: rgba(212, 175, 55, 0.08);
    position: absolute;
    top: 1rem;
    left: 1.5rem;
}

.quote-text {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.15rem;
    color: var(--color-white);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.quote-author {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.feature-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 1.8rem;
    border-radius: 16px;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg), var(--glow-primary);
}

.feature-icon {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.feature-card h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--color-white);
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* 8. Instruments Section */
.instruments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.instrument-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    text-align: center;
}

.instrument-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg), var(--glow-primary);
}

.instrument-icon {
    font-size: 2.8rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.instrument-card h3 {
    font-size: 1.35rem;
    color: var(--color-white);
    margin-bottom: 1rem;
}

.instrument-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 9. Contact / Inquiry Section */
.contact-card-wrapper {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    overflow: hidden;
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    box-shadow: var(--shadow-md);
}

.contact-info-panel {
    background: linear-gradient(135deg, var(--color-surface-hover), var(--color-bg));
    border-right: 1px solid var(--color-border);
    padding: 4rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.contact-info-panel h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: 1.5rem;
}

.contact-info-panel p {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 3rem;
}

.contact-details-list {
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.contact-info-item i {
    font-size: 1.3rem;
    color: var(--color-primary);
    width: 24px;
}

.contact-info-item span {
    font-size: 0.95rem;
    color: var(--color-text);
}

.contact-form-panel {
    padding: 4rem;
}

.form-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.form-group input, .form-group select, .form-group textarea {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-white);
    padding: 1rem 1.2rem;
    border-radius: 12px;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-fast);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--color-primary);
    background-color: var(--color-surface);
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.15);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23d4af37'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1.2rem center;
    background-size: 1.5rem;
    padding-right: 3rem;
}

.check-group {
    flex-direction: row;
    align-items: flex-start;
    gap: 1rem;
}

.check-group input {
    margin-top: 0.35rem;
    cursor: pointer;
}

.check-group label {
    text-transform: none;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    cursor: pointer;
}

.error-msg {
    color: #ff3b30;
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: 0.2rem;
    min-height: 18px;
}

/* 11. Footer Section */
.footer-section {
    background-color: #03060f;
    border-top: 1px solid rgba(212, 175, 55, 0.15);
    padding: 5rem 0 2rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 0.8fr 1.2fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 1.2rem;
    color: var(--color-white);
}

.footer-brand i {
    color: var(--color-primary);
}

.footer-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-links h4, .footer-legal h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    font-weight: 500;
}

.footer-links a:hover {
    color: var(--color-primary);
    padding-left: 5px;
}

.footer-legal p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 0.8rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.25);
    font-size: 0.85rem;
}

/* 12. Custom Dialog Alert */
.custom-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(5, 10, 24, 0.75);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.custom-dialog-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.custom-dialog {
    background-color: var(--color-surface);
    border: 1px solid var(--color-primary);
    border-radius: 24px;
    padding: 3rem;
    max-width: 450px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-lg), var(--glow-primary);
    transform: translateY(30px);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.custom-dialog-overlay.active .custom-dialog {
    transform: translateY(0);
}

.dialog-icon {
    font-size: 3.5rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.dialog-title {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: 1rem;
}

.dialog-text {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.65;
    margin-bottom: 2rem;
}

/* 13. Responsive Queries */
@media (max-width: 1024px) {
    .hero-section {
        flex-direction: column;
        text-align: center;
        padding-top: 7rem;
        gap: 3rem;
    }
    
    .badge {
        align-self: center;
    }

    .hero-subtitle {
        margin: 0 auto 2rem auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-features {
        order: -1;
    }

    .contact-card-wrapper {
        grid-template-columns: 1fr;
    }

    .contact-info-panel {
        padding: 3rem;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .mobile-nav-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        padding: 2rem;
        display: none;
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        display: block;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 1.5rem;
        align-items: stretch;
        text-align: center;
    }

    .nav-menu a {
        display: block;
        padding: 0.8rem 0;
    }

    .nav-cta {
        border-radius: 8px;
    }

    .header {
        padding: 0.5rem 0;
    }

    .section-padding {
        padding: 4rem 0;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .footer-brand {
        grid-column: span 1;
    }
}